A technician is inspecting the front suspension of a rear-wheel-drive vehicle equipped with a short-and-long arm (SLA) suspension where the coil spring is seated on the lower control arm. To accurately inspect the lower ball joint for wear and axial play using a dial indicator or pry bar, which procedure must be used to support the vehicle?
- ASupport the vehicle by the frame rail and allow the lower control arm to hang freely at full rebound
- Place a jack stand beneath the lower control arm as close to the ball joint as possible to unload the jointCevap
- CDisconnect the front shock absorber from the lower control arm to remove hydraulic weight support from the joint
- DPlace a jack stand beneath the center of the front stabilizer bar to equalize corner weight
Cevap
Place a jack stand beneath the lower control arm as close to the ball joint as possible to unload the joint
When a coil spring rests on the lower control arm in a short-and-long arm (SLA) suspension, the lower ball joint is the load-carrying joint. Placing a jack stand directly under the lower control arm as close to the wheel assembly as possible supports vehicle weight through that arm. This action compresses the coil spring and isolates the lower ball joint from spring tension, allowing technicians to accurately measure radial and axial play with a dial indicator.
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Anahtar Kavram
Identifying load-carrying ball joints in SLA suspension and neutralizing spring tension during diagnostic inspection
Tahmini Süre:1m 30s